Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
26
PUT
SPDR Gold Trust
GLD
$132B
| $604M | 0.47% |
3,520,200
+1,126,000
| +47% | +$201M |
|
|
27
CALL
Netflix
NFLX
$286B
| $574M | 0.45% |
15,207,000
-1,260,000
| -8% | -$53.4M |
|
28
CALL
Alibaba
BABA
$283B
| $568M | 0.45% |
6,551,600
-131,400
| -2% | -$12M |
|
29
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $512M | 0.4% |
1,529,400
+533,800
| +54% | +$185M |
|
30
PUT
Booking.com
BKNG
$139B
| $492M | 0.39% |
3,990,000
+1,622,500
| +69% | +$197M |
|
|
31
PUT
Advanced Micro Devices
AMD
$888B
| $455M | 0.36% |
4,420,500
+444,800
| +11% | +$48.3M |
|
|
32
CALL
Advanced Micro Devices
AMD
$888B
| $437M | 0.34% |
4,253,200
+145,000
| +4% | +$15.7M |
|
33
PUT
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $435M | 0.34% |
8,067,800
+1,779,700
| +28% | +$252M |
|
34
CALL
VanEck Gold Miners ETF
GDX
$22.7B
| $392M | 0.31% |
8,682,700
+546,600
| +7% | +$16.1M |
|
35
PUT
iShares Morningstar Value ETF
ILCV
$1.3B
| $374M | 0.29% |
5,041,100
+1,678,600
| +50% | +$113M |
|
36
PUT
Broadcom
AVGO
$1.84T
| $373M | 0.29% |
4,490,000
+465,000
| +12% | +$40.3M |
|
|
37
CALL
Walt Disney
DIS
$167B
| $337M | 0.27% |
4,159,900
+1,689,300
| +68% | +$144M |
|
|
38
CALL
Broadcom
AVGO
$1.84T
| $319M | 0.25% |
3,840,000
-949,000
| -20% | -$82.3M |
|
39
CALL
Adobe
ADBE
$90.3B
| $314M | 0.25% |
615,100
-57,200
| -9% | -$30M |
|
|
40
PUT
VanEck Gold Miners ETF
GDX
$22.7B
| $302M | 0.24% |
3,587,900
-1,582,500
| -31% | -$46.7M |
|
41
CALL
JPMorgan Chase
JPM
$918B
| $291M | 0.23% |
2,028,500
-355,500
| -15% | -$53.3M |
|
|
42
PUT
Alibaba
BABA
$283B
| $279M | 0.22% |
3,219,400
+337,600
| +12% | +$30.9M |
|
43
CALL
PayPal
PYPL
$49.3B
| $263M | 0.21% |
4,493,200
+1,327,600
| +42% | +$86.4M |
|
|
44
PUT
JPMorgan Chase
JPM
$918B
| $252M | 0.2% |
1,743,400
-240,800
| -12% | -$36.1M |
|
|
45
CALL
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $250M | 0.2% |
4,768,400
+198,700
| +4% | +$28.1M |
|
46
PUT
Salesforce
CRM
$139B
| $243M | 0.19% |
1,198,900
-283,000
| -19% | -$61.1M |
|
47
PUT
Boeing
BA
$161B
| $241M | 0.19% |
1,256,100
-39,100
| -3% | -$8.55M |
|
48
CALL
ExxonMobil
XOM
$629B
| $235M | 0.18% |
1,995,200
+337,500
| +20% | +$37M |
|
|
49
CALL
Boeing
BA
$161B
| $228M | 0.18% |
1,186,900
+66,000
| +6% | +$14.4M |
|
|
50
PUT
ExxonMobil
XOM
$629B
| $217M | 0.17% |
1,844,700
+551,000
| +43% | +$60.4M |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.